Power-stand for sewing-machines



A. H. DE VOE.

POWER STAND FOR SEWING MACH'INES.

APPucATloN man FEB.8.1917.

A. H. DE VOE.

POWER STAND FOR SEWING MACHINES.

APPLICATION man FEB.H.19|1.

1,347,840. Patented July 27, 1920.

7 SHEETS-SHEET 2.

A. H. DE VOE.

POWER STAND FOR SEWING MACHINES.

APPLICATION FILEI) FEB. 8. 19H. 1,347,840. ,Patented July 27, 1920.

7 SHEETS- SHEET 3.

A. H. DE VOE.

POWER STAND FOR SEWING MACHINES.

APPLICATION mw FEB. s. 1917.

1,347,840. Patented July 27, 1920.

7 SHEETS-SHEET 4.

A. H. DE V05. POWER STAND FOR SEWING MACHINES.

APPLICATION FILED FEB. 8.1917.A

Patented July 27, 1920.

7 SHEETS-SHEET 5A ljlyja A TTOR/VEV A. H. DE VOE.

POWER STAND FOR SEWING'IVIACHINES.

APPLlCATlON FILED FEB. 8, 19H.

Patented July 27, 1920.

7 SHEETS-SHEET 6.

/NvE/vron mu/.4 W

ATTORNEY A. H. DE VOE.

POWER STAND FOR SEWING MACHINES.

APPLICATION FILED FEB. B. 1917.

Ano/mfr Patented July 27,

7 SHEETS-SHEET 7.

UNET-ED STATES PATENT OFFICE.

ALBERT H. DE VOE, OF WESTFIELD, NEW JERSEY, ASSIGNOR T0 THE SINGER MANUFACTURING COMPANY, A CORPORATION 0F NEW JERSEY.

POWER-.STAND FOR SEWING-MACHINES.

Specification of Letters Patent.

Application filed February 8, 1917. Serial No. 147,296.

To all whom t may concern:

Be it known that l, ALBERT DE Von, a citizen of the United States, residing at Vestield in the county of Union and State of New jersey, have invented certain new and useful 1improvements in Power-Stands for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improvement in power-stands for sewing machines and has for certain of its objects to provide a power-stand of this class which will occupy a minimum of floor space, which shall insure convenience in the operation of the machine and facilitate the handling of the work, and which shall increase the capacity of the machine in its accommodation of various kinds of work, reduce the noise of operation of the sewing mechanism, provide safeguards against tire and insure against injury of the operator through contact with exposed moving parts.

In its preferred embodiment, the invention consists in a power-stand comprising a unit or a series of connected units each comprising a column sustaining at its head bearings in which is journaled a powershaft and sustaining a plurality of powertransmitters connected with the respective sewing machines sustained by rigid supporting shelves extending laterally in different directions from said column intermediate its head and foot and provided with seats to accommodate the bases of the respective sewing machines.

The sewing machines are preferably connected with their respective power-transmitters by means of belts passing over idlerpulleys mounted in swinging housings sustained by the transmitter frames and spring-retracted to produce the requisite tension upon the belts. 4The transmitters are preferably controlled by treadles disposed at the foot of the column which is preferably hollow so as to house therein the vertical connections between such treadles and the respective transmitters.

As the sewing machine supporting shelves are comparatively narrow so that the sustaining column may act as a barrier to prevent the tilting of the machine backward upon one edge to expose the parts beneath the bed-plate, means are preferably provided for shifting such ed e of the machine bed-plate at such time fg from the column so as to maintain the body orward or away of the machine in substantial register with the seats of its supporting shelf and thereby enable it to be tilted backwardly toward the column sufficiently for access to its parts beneath the bed-plate for purposes of inspection, cleaning, oiling, &c. l

Further constructive features, as well as the details of construction will be understood by a reference to the accompanying drawings, in which- Figure 1 is a side elevation of a powerstand constructed in accordance with the present improvement; and Figs. 1a and lb are enlarged elevations, partly in section, representing certain details of the driving means through which the power-shaft is actuated from the source of power. Fig. 2 is an end elevation of the power-stand. Fig.

3 is an enlarged vertical section of'one ofthe units of the power-stand, Fig. 4 is a plan of the Hoor-plate for the column and Fig. 5 a section, on the line 5 5 of Fig. 4, of the `base of the column and the floorplate. Fig-6 is a partial sectional elevation and Fig. 7 a similar end elevation of a pair of power-transmitters sustained by o ne of the columns, and Fig. 8 a perspective view representing parts of the transmitter.

Fig. 9 is al sectional plan of the stand represented in Fig. 1, the section being taken above the shelves. Fig. 1() is an enlarged plan view of one of the machinesupporting shelves, Fig. 11 a transverse section o f said shelf, and Fig. 12 a perspectiveview, upon a still larger scale, representing the pivotal support upon which the sewing machine bed-plate is shifted to facilitate tilting for exposure of the parts beneath the same. Fig. 13 is a detail perspective view representing a part of the connection of a treadle with its respective power-transmitter. Fig. 14 is a perspective view of a portion of one of the transmitter-frames. Fig. 15 is a detached view of one of the transmission-belt housings. Fig. 16 is a perspective view of a lateral rest for a sliding work-box, and Fig. 17 is a detail elevation representing an overhead spool-rack lwith its supporting means. Fig. 18 is an enlarged perspective View Patented July 27, 1920.

showing indetail a portion of the s oolrack. ig. 19 is a erspective view o one of the detachable ip-pans sustained beneath the sewing machine bed-plates. Fig. 20 is a transverse sectional elevation of the head of one of the columns and the transmitterframe sustained thereby. Figs. 21 and 22 are elevations showing, respectively, in side and edge View the referred form of belt-housing sustaining i ler-pulleys for the belt connecting a sewing machine with its respective power-transmltter.

As represented in the drawings, each unit of the power-stand comprises a hollow column or standard 1 havin its base flared to form'a hollow flange 2 which is formed with bosses 3 in which are tapped the adjusting screws 4 having lock-nuts 5.

The base of the column rests upon the raised central portion 6 of a floor-plate having depressed and apertured lateral seats 7 entered by fastening bolts 8 and an outer flange 9 secured to the floor by lag screws 10. The arched portion 6 has a central elongated aperture 11 having at one end the enlargement 12 adapted to receive the head of a bolt 13 whose shank extends upwardly through the aperture 11 and through an aperture in the cross-member 14 formed in the lower portion of the column 1, the threaded upper end of the bolt 13 being provided with the nut 15 which is accessible through one of the lateral openings 16 of the column. The portion 6'of the floorplate is shown provided with a series of raised seats 17 surrounding the aperture 11 to receive the thrust of the adjusting screws 4 by means of which the column may be lined up, to compensate for any unevenness or lack of true of the floor.

The columns 1 are shown provided upon opposite sides intermediate their ends with the lugs or projections 18 affording vertical seats to which are secured by bolts 19 flanges 20 from which extend laterally the sewing machine supporting shelves 21 each formed with an aperture 22 to receive a` sewing machine base or bed-plate a which is adapted to rest upon the corner lugs 23; these shelves being formed as flat plates with depending stifl'ening ribs or flanges 21. The sewing machine supporting shelves are preferably provided each with a bed-plate receiving aperture having corner lugs of suitable form to accommodate the bed-plates or bases of the types of machines which they are designed to sustain; and certain of them are preferably further provided with movable supporting means to facilitate the turning of the machine for exposure of parts beneath the bed-plate.

To facilitate the tilting of the sewing machine from operative position, as indicated in full lines in Fig. 11, to the dotted line position of said ligure, the shelf is provided Secured upon said rock-shaft near one end is a hand-lever 29 formed adjacent its hub with a slotted segment plate 30'.

The segmental slot 30 of the plate 30 is entered by the clamp-screw 31 passin through a bearing boss 32 of the shelf 21 an having its head 33 provided with a crossbar 34 for turning the same. The inner portion of the screw 31 enters a nut 35 which is embraced and restrained from turning therewith by means of flanges 36 extending from the inner face of a washer having oppositely projecting wings 37 entering the slot 30 of the segment plate 30. The segment plate may obviously be clamped byl means of the screw 31 against the adjacent end of the bearing boss 32 to normally hold the rock-shaft 24 against turning and thus maintain the rearward edge of the sewing machine bed-plate in operative position.

The front edge of the bed-plate may obviously be similarly maintained seated upon its respective corner lugs 23 by means of a common form of fastening device comprising a clamp-bolt 38 having at one end a laterally extending head 39 resting upon the bed-plate and upon the threaded opposite end a wing-nut 40 seated upona suitable part of the table 21.

As represented in Figs. 3 and 19, the shelf 21 may be provided with a detachable drippan 41 having its end walls extended upwardly to form hooked lugs 42 adapted to rest upon the rock-shaft 24, the front side being formed with a forked lateral lug 43 entered by the bolt 38 and clamped against the lower edge of one of the shelf flanges 21 by means of the nut 40. The nut 40 may be turned to loosen the grip of the head 39 upon the sewing machine bed-plate without disturbing the drip-pan, but the latter may be withdrawn by removal of the nut 40 so that the pan may be tilted downwardly preparatory to detachment from the supporting shaft 24. j

In order to tilt the sewing machine backward, as represented in dotted lines in Fig. 11, to expose the parts beneath the bedplate, the clamp-bolt 38 may be loosened and turned to disengage it from the bedplate, and the niachine swung backwardly, the lever 29, previously unclamped by turn.- ing the bolt 31, being at the same time thrust downwardly to throw the supporting arms 25 forwardly across the shaft 24.

In this position, the machine remains `,above and substantially in register With its normal operative position upon its respective supporting shelf, the arm b resting against the column 1 or against a post 44 which may be provided for the purpose, as represented in dotted lines in Fig. 11. Under such condition, the center of gravity of the sewing machine lies between the pivotal supporting pins 26 and the more remote seats 23, and thus has no tendency to falling from this position through loss of balance or jarring or other means, while presenting the parts beneath the bed-plate easily accessible to the operator.

J ournaled in suitable bearings beneath the shelf 21 is a cross rock-shaft 45 having at its forward end a normally depending kneelever 45 provided with the knee-plate 46 (Fig. l1), the rock-shaft being provided with the usual thrust-plate 0r lug 47 (Fig. '10) adapted to engage a part of the sewing machine, such as a lifting rod for the presser-bar. One of the depending flanges 21 of the shelf is formed with a lateral notch or recess, as indicated in Figs. 10 and 11, into which one edge of the plate 46 will snap by a slight springing of the lever 45 when swung upwardly so as to maintain the knee-lever in upper inoperative position.

As represented in Figs. l, 2 and 9, each of the columns 1 is provided upon opposite sides with a bearing 48 in which is rigidly secured a laterally extending rail 49 to which are slidingly fitted the hooks or inverted stirrups 50 extending from the adjacent upper edge of a sheet-metal work-box 51, the adjacent side of which rests against the shoe 52 having its shank 53 secured in a suitable lateral boss in the lower portion of the column 1. As shown particularly at the left in Fig. 9, each work-box normally occupies a position mainly below and in the rear of its machine supporting shelf, so that the finished work naturally falls therein without special attention upon the part of the operator; but may be readily drawn to a position in advance ofthe machine to facilitate the removal of its contents.

In conjunction with these sliding workboxes are preferably provided collapsible bundle racks adapted to be opened out from closed position to receive and support the work preparatory to stitching and to again receive the work for convenience in bundling when removed from the work-box containing the stitched articles.

Secured upon the floor near the base of the column 1 are the floor-platesi54 each provided with upright sockets 55 preferably open at the outer edge as well as the top with the sides connected together at the top by a cross-pin 56. Near the bottom of each socket 55 is mounted upon a pivotal pin 57 one end of a swinging post 58 upon Whose opposite end is pivotally mounted the forked depending lug 59 of the platform 60, the lug 59 having the cross-pin 61 which rests against the post 58 when the rack is opened out, as represented in the drawings, in which condition the lower portion of the post 58 rests against the cross-pin 56. may be readily closed when not in use, as represented in dotted lines at the left in Fig. 2, by tilting the plate 60 against the front side of an adjacent work-box and swinging the post 58 in the same direction, thereby removing any obst uction which the rack would offer in the laisles between adjacent series of power-stands of the present type.

The upper end portion of each column 1 (Fig` 20) is contracted to afford a vertical bearing boss in which is adjustably secured by means of the set-screw 62 the cylindrical shank 63 of a bearing yoke 64 carrying the center-screws 64 whose conical points enter similar cavities in the trunnions 65 extending oppositely from the central contracted portion 66 of a duplex transmitter-frame. This frame is shown formed at the opposite ends with enlargements 67 having depending extensions 68 open at the bottom to accommodate transmission belts; and pro'- yided upon the upper side with hinged covers 69 for access to the interiors. By loosening the set-screw 62, the transmitter-frame supporting yoke 64 may be adjusted vertically or circularly, while such frame may be tilted upon its supporting center screws 64', so as to insure alinement with the power-shaft 70 eXtendin through the same: The body portion 66 o the frame is bored out to receive the telescopically arranged bushings 71 and 72 secured in position by means of the set-screws 73 passing through clearance apertures 'in the one and bearing upon the other (Fig. 6), the inner bushing affording a supporting bearing for the shaft 70. These bushings are formed with enlargements in their respective opposite end portions to afford bearings upon each of which is fitted the hub 74 of one of the peripherally grooved belt-wheels 75 housed within the enlarged end portions 67, 68 of the transmitter-frame and adapted to rotate freely upon their respective bushings. As shown more fully in my pending application Serial No. 85,535, filed March 21, 1916, the pulley 75 has a lateral brakewheel extension 76 formed in its outer face with a recess presenting a conical clutch face adapted for engagement by the conical face 77 of the clutch-disk 78 formed with the tubular hub 79. The clutch disk is shown provided with a diametrical slot 80 loosely embracing the correspondingly arranged driving arms 81 of a collar 82 secured by means of the set-screw 83 upon the shaft 70 within the hub 79 which is adapted to slide freely over the same in the The rack movement of the clutch-disk into and out of operative relation with the clutch element 76.

The contracted outer extremity of the hub 79 is adapted to be engaged by the thrust collar 84 embraced by and connected with the yoked arm 85 of a rock-lever having its hub portion 86 fulcrumed upon the stud 87 and rovided with a depending cam-arm 88. yhe fulcrum-stud 87 is sustained by a rigid arm 89 extending from the cap 90 closing the adjacent end of the transmitter-frame and formed with a tubular boss 91 embracing the hubs 79 and 82 and the thrust collar 84, this boss being extended beyond the collar 84 and provide in its outer portion with the lateral cap 92 secured to the same by clamp-screws 93.

Fulcrumed -upon a stud 94 sustained by a lug 95 extending from the cap 90 is a plural-armed lever comprising the angularly arranged arms 96, 97 and 98. The arm 96 sustains an endwise adjustable plate 99 carrying a roller-stud 100 adapted for engagement with the cam edge of the arm 88, and is maintained in lower and normally inoperative position by means of the spring 101 interposed between a socket in the arm 97 and the bottom of thev fulcrum-sustaining arm 89. The arm 98 is apertured in the usual manner to receive the hooked upper end of the treadlc-rod 102 extending downwardly through one of the lateral apertures 1 near the upper end of the column 1.

The rod 102 is connected at its lower end (Fig. 3) to the lateral crank-arm 103 of a transverse rock-shaft 104 journaled in a lateral bearing boss 105 at the foot of the column 1 and provided upon its outer end with a depending crank-arm 106. The crank-arm 106 is pivotall connected with one of the sections 107 o a pitman, these sections being adjustably secured together by means of the apertured block 108 and set-screws 109 in a manner well-known. The

other of these pitman sections is connected with a crank-arm 110 depending from one of the trunnions 111 of the treadle-plate 112 sustained upon the sup orting floor by means of the usual bearing rackets 113.

By employment of the described intermediate rock-shaft, the highly desirable housing of the trea-dle-rod 102 within the column may be maintained while providing for the advantageous lateral positioning of the treadle-plate to suit the requirements of individual operators, the compound pitman 107 readily accommodating itself to the spacing apart of the treadle-plate and rockshaft 104.

Each of the belt-pulleys 75 is shown embraced by a transmission belt 114 which is led around the grooved pulley of the balance-wheel c, as represented in Figs. 1 and 2. These belts are shown inclosed each within a divided tubular housing comprismg the abutting sections 115 pivotally connected together at their upper ends by means of a fulcrum-pin 116 journaled within bearlng apertures .117 (Iig. 7) formed yin the transmitter-frame extensions 68. The inner housing section has pivotally connected thereto one end of a brace-rod 118having its other end ortion adjustably secured to the column 1 y means of a suitable clampscrew 119. The outer housing section normally rests by gravity upon the complemental section.

When the sewing machine is to be removed or turned over for access to the parts beneath the bed-plate, the clampscrew 119 may be loosened and the housing sections 115 swung apart for removal of the belt 114 from the balance-Wheel pulley, after which the machine will be free to be moved as desired.

Figs. 21 and 22 represent a preferred form of belt connection, and housing therefor, between the transmitter pulley and the sewing machine. Upon a cross-pin 120 near the mouth of the transmitter-frame extension 68 is mounted the tubular spacing stud 121 of a swinging belt housing 122 of rectangular cross-section open at the rear side and carrying adjacent its Jforwardly open lower end the idler pulleys 123 mounted upon the crossshaft 124. The housing 122 has near its upper end a lateral socket 125 containing a spring 126 interposed between the bottom of the same and a thrust lug 127 upon the frame section 68.

The two branches of the belt 114 are led from the pulley 75 downwardly beneath the idler pulleys 123 and around the pulley .of the machine balance-wheel c, being main- 105 tained at a uniform tension by the retracting action of the spring 126 upon the housing 122. By this means, the housing will readily yield to permit the belt to be slipped over the balance-wheel when the machine is to be 110 removed, or will permit the idlers to follow the movements of the machine when being tilted upon its supporting shelf, without disturbing the encircling belt.

As represented in Fig. 1, the adjacent 115 faces ofthe transmitter-frames sustained by two adjacent columns are provided with angle-pieces 128 upon which is secured a connecting inverted T-beam 129. Secured upon this beam intermediate its ends by means of 120 clamp-bolts 130 is a divided bracket-piece 131 having end flanges 132 to which are bolted the opposite Hat sides 133 of shaft hangof catch-bars 138 hinged at 139 and normally maintained in locking position by means of the bolts 140 and wing-nuts 141 or by other suitable means.

Fixed upon the shaft. intermediate the bearings 134 is a pulley 142 formed with a :Mics of peripheral grooves entered by a corresponding series of convolutions of an endless belt 143 passing over a similarly grooved pulley 144 uponv a driving shaft 1115 suitably mounted within the bearing of a hanger 146 attached to the ceiling in a' manner well known. Rigidly sustained in suitable lugs 147 of this hanger is the vertical guide-bar 148 upon which is slidingly fitted by a spline-and-groove connection the sleeve 149 provided with a llateral stud 150 carrying the grooved belt-wheel 151 entering a loop of the driving belt 143 extend- We.' from the opposite end grooves of the pulley 144. The sleeve 149 and wheel 151 are of such weight, or may be so weighted, that the' driving belt 143 is given a uniform tension of the required amount to produce the necessary driving impulse between the driving shaft 145 and the power-Shaft 70. The wheel 151 thus constitutes an idler for maintaining the driving belt taut with 'a uniform tension throughout the lengths of the pulleys 142 and 144.

Intermediate the adjacent transmitter casings, or between such casings and .the hangers 133, the power-shaft 70 is housed within the surrounding pipe sections 152 each having one end clamped within one of the bosses 91 and the other entering either another of said bosses or a boss 135 of a box 135. When extending between two of the bosses 91, with its respective ends clamped therein, it is evident that these pipe sections 152 constitute tubular braceswhich aid in stiii'ening a structure comprising several of the described units each including one of the columns 1; the columns embracing between them the hangers 133 being braced by means of the T-beam 129.

The structure is further stiffened by means of the parallel stay-rods 153 having their end portions fitted within sockets formed in alined bosses '154 and 155 formed at opposite sides of the transmitter-frames 67 and their end caps 90 in which they are secured by means of set-screws 156. The end portions of these rods constitute pintles upon which the tubular boss 69 of each hinged cover-plate is mounted and upon which it may be swung to give access to the bearings of the transmitter. y

The stay-rods 153 afford convenient overhead supports for spool-stands of special construction which have been designed for employment in the present structure. These stands each comprise a plural-armed spiderframe 15,7, the armsJ being divergently er1 ranged and each provided with a hooked extremity 157 adapted to engage one of the rods 153. Each of the frames 157 is formed at one side of its center with ya socket 158 in which is secured by means of a set-screw 159 a vertical standard 160 having secured upon-its lower end by a set-screw 161 the socket 162 of a cross-member 163 carrying a plurality of spool-holders 164 with vertical spool-pins 165 adapted to receive a commercial thread-spool. The standard 160 is shown provided at its upper end (Figs. 1, 3, 17 and 18) with a cross-member 166 sus- `\taining guide-loops 167 corresponding in number with the spool-holders sustained by the respective standard. The thread is led as usual from each spool upwardly through its respective guide-loop and thence to the sewing machine which it is designed to supply with thread. 1

' From the foregoing description it will be seen that the present improvement provides a rigid structure occupying a minimum of fioor space for a iven number of sewing machines and absor ing the greater portion of the vibration of individual machines and also reducing thenoise of operation; that the space beneath the machines is wholly free from the driving mechanism so as to accommodate convenient work-receptacles, to facilitate cleaning and prevent accumulation of lint and other matter likely to cause or increase the danger of lire; that i the work-holders or receptacles normally occupy a minimum of space and are capable of assuming the most advantageous ositions both for reception and removal o the work; that the individual character of the machine-supporting shelves or tables and their detached relation facilitates the accommodation 'of circular articles requiring endless seams, such as skirts; and that the various parts are so arranged and sustained as to provide for a maximum economy and convenience in the operation of the sewing machines of a group.

It is obvious that the improvement is susceptible of very material modification, both in construction and arrangement of its several parts, within the scope of the invention; and that certain of its features may without departure from the invention be effectively employed without certain others of its features.

Having thus set forth the nature of the invention, what I claim herein is 1. A sewin machine stand comprising a column carrymg intermediate its head and foot a sewing machine supportin Ashelf or table and provided at its foot wit a fiange extending at substantially right angles to the axis of the column, a floor-plate constructed separately from said column, fastening means for. tiltably securing said I for tiltably -adjusting the said column on the floor late.

2. sewing machine stand comprising a hollow column` carrying intermedlate its head and foot a sewing machine shelf or table and provided at its foot with a flange and withan interior cross-member above the same, a floor-plate constructed separately from said column and provided with a centrally disposed aperture and with a surrounding series of'seatsupon its upper face, a bolt for connecting the centrally apertured portion of said Hoor-plate with the crossmember of said column, and adjusting bolts tapped in the flange of said column and bearing upon the seats of the floor-plate.

3. A sewing machine stand comprising a shelf or table provided with sewing -machine positioning means, and means for pivotally supporting the machine bed-plate and for shifting the same transversely of said positioning means to permit the machine to be tilted to expose its bottom without substantial bodily lateral displacement from register with said positioning mean's 4. A sewing machine stand comprlsing a shelf or table having an opening to r'eceive the sewing machine bed-plate with means for supporting the machine in register with said opening, and means for pivotally supporting the machine bed-plate and shifting the same across said opening to permit the machine to be tilted to expose its bottom without substantial bodily displacement from register with said opening.

5. A sewing machine stand comprising a shelf or table provided with sewing machine positioning means, a swinging support connected to the machine bed-plate and having a fulcrum below the top of the table and intermediate component elements of said positioning means and adapted for movement to carry its point of connection with the bed-plate across said fulcrum to permit the machine to be tilted for exposure of its bottom without substantial bodily lateral displacement from register with said positioning means.

6. A sewing machine stand comprising a shelf or table having an opening to receive the sewing machine bed-plate with means for supporting the machine in register with said opening, a swinging support connected to the machine bed-plate and having a fulcrum intermediate the edges of said opening and adapted for movement to carry its point of connection with the bed-plate across said fulcrum l.to permit the machine to be tilted for exposure of its bottom without substantial bodily displacement from register with said o ening.

7. A sewing mac ine stand comprising an upright column carrying intermediate its head and foot and extending mainly from one side thereof a shelf Q1; tabl@ $11.5-

taining a sewing machine bed-plate, and a swinging support connected to the machine bed-plate and having a fulcrum at the side of said connection farthest from said column and adapted for movement to carry said oint of connection across said fulcrum and arther from said column to permit the machine to be tilted toward but unobstructedly by said column.

8. A sewing machine stand comprising an upright column carrying intermediate its head and foot and extending mainly from one side thereof a shelf or table having an opening and sustaining in register therewith a sewing machine bed-plate, a rock-shaft beneath said opening, laterally extending arms fixed to said rock-shaft and .pivotall connected to said bed-plate, and means or turning said rock-shaft to shift said arms across the same to facilitate the tilting of the machine for access to the bottom thereof.

9. A sewing machine stand comprising 1 an upright column carrying intermediate its head and foot and extending mainly from one side thereof a shelf or table having an opening and sustaining in register therewith a sewing machine bed-plate, a rock-shaft beneath said opening, laterally extending arms fixed to said rock-shaft and pivotally connected to said bed-plate, means for turning said rock-shaft to shift said arms across the same to facilitate the tilting of the machine for access to the bottom thereof, and means for locking said rockshaft against turning.

l0. A sewing machine stand comprising an upright column carrying intermediate its head and foot and extending mainly from one side thereof a shelf or table having an opening and sustaining in register therewith a sewing machine bed-plate, a rockshaft beneath said opening, sustaining means for shifting said bed-plate crosswise of said opening, fastening means for maintaining the sewing machine in operative position, and a drip-pan pivotally sustained upon said rock shaft and maintained in operative position beneath said opening by said fastening means.

11. A sewing machine stand comprising an upright column carrying intermediate its head and foot and extending mainly from one side thereof a shelf or table having an opening and sustaining in register therewith a sewing machine bed-plate, a rock-shaft beneath said opening, sustaining means for shifting said bed-plate crosswise of said opening, fastening means for maintaining the sewing machine in operative position, and a drip-pan formed with flanges having hooked arms embracing said rock-shaft and engaged also by said fastening means for maintaining it in operative position beneath said opening.

12. A sewing machine stand comprising 'an upright column carrying intermediate its head' and foot and extending mainly from one side thereof a shelf or table having an opening and sustaining in register therewith a sewing machine bed-plate, a

Hanges having hooked arms embracing said rock-shaft and a forked lug embracing said clamp-bolt by which it is clamped to said shelf.

13. A sewing machine stand comprising a support having a shelf with an opening therein, a sewing machine supported in said opening and having a pivotal mounting, and means whereby the pivotal mounting may be disposed at either side ofthe opening.

14. A sewing machine stand comprising a support having a shelf with an opening therein, a sewing machine having a pivotal mounting at one side of the opening, and means whereby the pivotal mountin may be moved from one side of the opening to the other while the machine is being swung on its pivot.

15. A sewing machine stand comprising a support having a shelf with an opening therein, a sewing machine supported in said opening, nd means whereby the machine may be tilted from a vertical to a horizontal position above the opening while maintaining it substantially in register with said opening.

16. A sewing machine stand comprising a column, a shelf secured thereto at a point below its top, a sewing machine having a pivotalmounting on said shelf adjacent said column, and means for moving said mounting away from said column when the machine is tilted von its pivot,'whereby interference with said column is avoided.

17. A sewing machine stand comprising a support having a shelf with an pening therein, a sewing machine supported in said opening, a pivotal mounting for said machine, and means whereby the pivotal mounting may be shifted to allow the machine to be tilted from a vertical to a substantially horizontal position while maintaining it substantially in register with saidl opening.

18. A sewing machinestand comprising an upright column sustaining intermediate its head and foot a sewing' machine supporting shelf and below it a transverse rall, and a work-receptacle movably sustained upon said rail, disposed beneath said shelf and adapted to beshifted laterally for exposure of the shelf.'

19. A sewing machine stand comprising an upright column sustaining intermediate its head and foot a sewing machine supporting shelf and below it a transverse rail, and a Work-receptacle disposed below said shelf and slidingly mounted at the side adjacent the column upon said rail and adapted to be shifted laterally for exposure forwardly and rearwardly of the shelf, said column being provided beneath the rail with a lateral support against whicli the lower portion of the work-receptacle rests.

20. A sewing machine stand comprising an upright column carrying intermediate its head and foot a sewing machine shelf or table having an opening to receive a sewing machine bed-plate, a rock-shaft sustained by said shelf or table beneath saidopening and carrying a normally depending kneelever for operation upon an element of the sewing machine, and detaining means for temporarily holding the lever elevated in inoperative position when swung upwardly for the purpose.

2l. A sewing machine stand comprising an upright column carrying intermediate its head and foot a sewing machine shelf or table having an opening to receive a sewing machine bed-plate and an adjacent depending rib or flange formed with a lateral detent notch, a rock-shaft sustained by said shelf or table beneath said opening and carrying a normally depending knee-lever for operation upon an element of the sewing machine, and a knee-plate fixed to said lever with an edge adapted to spring into said detent notch of the shelf-flange by which it is yieldingly detained when the knee-lever is raised into inoperative` position. I 22. A sewing machine stand comprising an upright column sustaining intermediate its head and foot a sewing machine supporting shelf, a work-receptacle, and means whereby the work-receptacle is movably sustained by said column disposed beneath said shelf and adapted to be shifted laterally on its sustaining means for exposure forwardly and rearwardly of the shelf.

-In testimony whereof I have signed my name to this specification.

ALBERT H, DE von.

It shereby certified that in Letters Patent N o. 1,347,840, granted July 27, 1920,'

upon the application of Albert H. De Voe, of Westfield, New Jersey, for an improvement in Power-Stands -for Sewing-Machines, an error .eppears in the printed specification requiring correction as follows: Page 7, line 64, claim 18., after the Word exposure insert the Words forwardly and rearwardly; and thatkthe said Letters Patent should be read with this correction therein that the sarnemay conform to the record yof the vcese in the Patent Office.

Signed and sealed this 24th day of August, A. D., 1920.

` M. H. COULSTON,

Acting Commissioner of Patents [SEAL] 

